Cloning of a novel human testis mRNA specifically expressed in testicular haploid germ cells, having unique palindromic sequences and encoding a leucine zipper dimerization motif.
A novel gene coding for a human sperm surface protein (HSS) has been cloned from a human testis cDNA library. The 2.5 kb cDNA (hss) contains five direct repeats, three mirror repeats, three possible stem loop structures and three unique palindromic motifs located at functionally relevant positions. Open reading frame encodes a protein of 766 amino acids. The deduced protein analysis revealed a NH2 terminus extracellular domain having a leucine zipper (LZ) motif, a transmembrane helical domain and a cytoplasmic domain at the COOH terminus. Tissue specific expression studies demonstrated the presence of hss transcript only in testis. Cell type expression of hss mRNA was observed only on the round spermatids suggesting haploid germ cell expression.
Shankar
S
S
Genes and Proteins Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, India.
Mohapatra
B
B
Suri
A
A
D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D019281:Dimerization; D005786:Gene Expression Regulation / Q000235:genetics; D006801:Humans; D017403:In Situ Hybridization; D016350:Leucine Zippers / Q000235:genetics*; D008297:Male; D008565:Membrane Proteins / Q000737:chemistry*; D008969:Molecular Sequence Data; D012333:RNA, Messenger / Q000032:analysis*; D017422:Sequence Analysis, DNA; D013091:Spermatogenesis / Q000502:physiology; D013094:Spermatozoa / Q000737:chemistry*; D013737:Testis / Q000737:chemistry*
D048868:Adaptor Proteins, Signal Transducing; D008565:Membrane Proteins; D012333:RNA, Messenger; C111047:SPAG9 protein, human